<template>
  <div class="table">
    <div class="container">
      <div class="handle-box">
        <el-button type="primary" size="mini" @click="delAll">批量删除</el-button>
        <el-input v-model="select_word" size="mini" placeholder="筛选关键字" class="handle-input"></el-input>
        <el-button type="primary" size="mini" @click="centerDialogVisible = true">添加歌单</el-button>
      </div>
    </div>
    <el-table size="mini" ref="multipleTable" border style="width:100%" height="680px" :data="data" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="40"></el-table-column>
      <el-table-column label="歌单图片" width="110" align="center">
        <template slot-scope="scope">
          <div class="songList-img">
            <img :src="getUrl(scope.row.pic)" style="width:100%"/>
          </div>
          <el-upload :action="uploadUrl(scope.row.id)" :before-upload="beforeAvatorUpload"
                     :on-success="handleAvatorSuccess">
            <el-button size="mini">更新图片</el-button>
          </el-upload>
        </template>
      </el-table-column>
      <el-table-column prop="title" label="标题" width="120" align="center"></el-table-column>
      <el-table-column label="简介">
        <template slot-scope="scope">
          <p style="height:100px;overflow:scroll">{{scope.row.introduction}}</p>
        </template>
      </el-table-column>
      <el-table-column prop="style" label="风格" width="120" align="center"></el-table-column>
      <el-table-column label="歌曲管理" width="110" align="center">
        <template slot-scope="scope">
          <el-button size="mini" @click="songEdit(scope.row.id)">歌曲管理</el-button>
        </template>
      </el-table-column>
      <el-table-column label="评论" width="80" align="center">
        <template slot-scope="scope">
          <el-button size="mini" @click="getComment(data[scope.$index].id)">评论</el-button>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="150" align="center">
        <template slot-scope="scope">
          <el-button size="mini" @click="handleEdit(scope.row)">编辑</el-button>
          <el-button size="mini" type="danger" @click="handleDelete(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <div class="pagination">
      <el-pagination
        background
        layout = "total,prev,pager,next"
        :current-page="currentPage"
        :page-size="pageSize"
        :total="tableData.length"
        @current-change="handleCurrentChange"
      >
      </el-pagination>
    </div>

    <el-dialog title="添加歌单" :visible.sync="centerDialogVisible" width="400px" center>
      <el-form :model="registerForm" ref="registerForm" label-width="80px">
        <el-form-item prop="title" label="标题" size="mini">
          <el-input v-model="registerForm.title" placeholder="标题"></el-input>
        </el-form-item>
        <el-form-item prop="introduction" label="简介" size="mini">
          <el-input v-model="registerForm.introduction" placeholder="简介" type="textarea"></el-input>
        </el-form-item>
        <el-form-item prop="style" label="风格" size="mini">
          <el-input v-model="registerForm.style" placeholder="风格"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
                <el-button size="mini" @click="centerDialogVisible = false">取消</el-button>
                <el-button size="mini" @click="addSongList">确定</el-button>
            </span>
    </el-dialog>

    <el-dialog title="修改歌单" :visible.sync="editVisible" width="400px" center>
      <el-form :model="form" ref="form" label-width="80px">
        <el-form-item prop="title" label="标题" size="mini">
          <el-input v-model="form.title" placeholder="标题"></el-input>
        </el-form-item>
        <el-form-item prop="introduction" label="简介" size="mini">
          <el-input v-model="form.introduction" placeholder="简介" type="textarea"></el-input>
        </el-form-item>
        <el-form-item prop="style" label="风格" size="mini">
          <el-input v-model="form.style" placeholder="风格"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
                <el-button size="mini" @click="editVisible = false">取消</el-button>
                <el-button size="mini" @click="editSave">确定</el-button>
            </span>
    </el-dialog>

    <el-dialog title="删除歌单" :visible.sync="delVisible" width="300px" center>
      <div align="center">删除不可恢复，是否确定删除？</div>
      <span slot="footer">
                <el-button size="mini" @click="delVisible = false">取消</el-button>
                <el-button size="mini" @click="deleteRow">确定</el-button>
            </span>
    </el-dialog>
  </div>
</template>

<script>
  import {getAllSongList,setSongList,updateSongList,delSongList} from '../api/index';
  import { mixin } from '../mixins/index';
  export default {
    mixins: [mixin],
    data(){
      return{
        centerDialogVisible: false, //添加弹窗是否显示
        editVisible: false,         //编辑弹窗是否显示
        delVisible: false,          //删除弹窗是否显示
        registerForm:{      //添加框
          title: '',
          introduction: '',
          style: ''
        },
        form:{      //编辑框
          id: '',
          title: '',
          introduction: '',
          style: ''
        },
        tableData: [],
        tempData: [],
        select_word: '',
        pageSize: 5,    //分页每页大小
        currentPage: 1,  //当前页
        idx: -1,          //当前选择项
        multipleSelection: []   //哪些项已经打勾
      }
    },
    computed:{
      //计算当前搜索结果表里的数据
      data(){
        return this.tableData.slice((this.currentPage - 1) * this.pageSize,this.currentPage * this.pageSize)
      }
    },
    watch:{
      //搜索框里面的内容发生变化的时候，搜索结果table列表的内容跟着它的内容发生变化
      select_word: function(){
        if(this.select_word == ''){
          this.tableData = this.tempData;
        }else{
          this.tableData = [];
          for(let item of this.tempData){
            if(item.title.includes(this.select_word)){
              this.tableData.push(item);
            }
          }
        }
      }
    },
    created(){
      this.getData();
    },
    methods:{
      //获取当前页
      handleCurrentChange(val){
        this.currentPage = val;
      },
      //查询所有歌单
      getData(){
        this.tempData = [];
        this.tableData = [];
        getAllSongList().then(res => {
          this.tempData = res;
          this.tableData = res;
          this.currentPage = 1;
        })
      },
      //添加歌单
      addSongList(){
        let params = new URLSearchParams();
        params.append('title',this.registerForm.title);
        params.append('pic','/img/songListPic/123.jpg');
        params.append('introduction',this.registerForm.introduction);
        params.append('style',this.registerForm.style);

        setSongList(params)
          .then(res => {
            if(res.code == 1){
              this.getData();
              this.notify("添加成功","success");
            }else{
              this.notify("添加失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        this.centerDialogVisible = false;
      },
      //弹出编辑页面
      handleEdit(row){
        this.editVisible = true;
        this.form = {
          id: row.id,
          title: row.title,
          introduction: row.introduction,
          style: row.style
        }
      },
      //保存编辑页面修改的数据
      editSave(){
        let params = new URLSearchParams();
        params.append('id',this.form.id);
        params.append('title',this.form.title);
        params.append('introduction',this.form.introduction);
        params.append('style',this.form.style);

        updateSongList(params)
          .then(res => {
            if(res.code == 1){
              this.getData();
              this.notify("修改成功","success");
            }else{
              this.notify("修改失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        this.editVisible = false;
      },
      //更新图片
      uploadUrl(id){
        return `${this.$store.state.HOST}/songList/updateSongListPic?id=${id}`
      },
      //删除一个歌单
      deleteRow(){
        delSongList(this.idx)
          .then(res => {
            if(res){
              this.getData();
              this.notify("删除成功","success");
            }else{
              this.notify("删除失败","error");
            }
          })
          .catch(err => {
            console.log(err);
          });
        this.delVisible = false;
      },
      //转向歌曲管理页面
      songEdit(id,name){
        this.$router.push({path:`/ListSong`,query:{id}});
      },
      //转向该歌单的评论列表
      getComment(id){
        this.$router.push({path: '/comment',query:{id}})
      }
    }
  }
</script>

<style scoped>
  .handle-box{
    margin-bottom: 20px;
  }
  .songList-img{
    width: 100%;
    height: 80px;
    border-radius: 5px;
    margin-bottom: 5px;
    overflow: hidden;
  }
  .handle-input{
    width: 300px;
    display: inline-block;
  }
  .pagination{
    display: flex;
    justify-content: center;
  }
</style>
